Spindle for supporting work engaging strips



July 26, 1949. Q K ZIEBUR 2,477,109

SPINDLE FOR SUPPORTING WORK ENGAGING STRIPS Filed April 18, 1947 7 I OJCZz'e Z167" Al/m'ney:

Patented July 26, 1949 ENT OFFICE SPINDLE FOR SUPPORTING WORK ENGAGING STRIPS Otto K. Ziebur, New London, Application April 18, 1947, Serial No..1742,406 3 Claims. (01. 1-494) This invention relates to a spindle primarily adapted for supporting an elongated strip of abrasive material but which is likewise well adapted for supporting strips of other material for use in buffing and polishing or similar operations and to which a compound for such operations may be added.

More particularly, it is an object of the present invention to provide an improved construction of Supporting spindle having means for effectively mounting an elongated work engaging strip thereon so that it can be readily applied to or removed from the spindle and so that it will be supported spirally wound around the spindle and with the convolutions thereof in engagement.

More particularly, it is an object of the present invention to provide novel strip retaining means for a spindle by means of which a strip, such as an abrasive strip may be effectively secured spirally wound thereon and without the use of an adhesive or other securing mediums and so that the strip may be quickly and easily removed and replaced.

Various other objects and advantages of the invention will hereinafter become more fully apparent from the following description of the drawing, illustrating preferred embodiments thereof, and wherein:

Figure 1 is a plan view of one embodiment of the spindle shown with an abrasive strip spirally wound and secured thereon; r v

Figure 2 is a view similar to F1 ure 1 but showing the spindle at right angles to its position of Figure land with the abrasive strip and retaining collar thereof removed Figure 3 is an enlarged longitudinal sectional View, partly in elevation showing the spindle assembled and with an abrasive strip thereon;

Figure 4 is a cross sectional view of the assembled spindle taken substantially along a plane as indicated by the line 4-4 of Figure 3;

Figure 5 is a fragmentary plan view of the abrasive strip;

Figure 6 is an end elevational view of another embodiment of the abrasive spindle, and

Figure '7 is an enlarged fragmentary side elevational view, partly in section of the outer end of the spindle of Figure 6.

Referring more specifically to the drawing, the invention will be described in conjunction with its use for mounting a strip of abrasive material but it will be readily apparent as the description proceeds that strips of other material and for other uses such as cloth used for polishing or bumng could readily be mounted on the spindle in the same manner and for the same purpose as the abrasive strip.

Referring particularly to Figures 1 to 5, in the embodiment of the invention as disclosed therein the improved spindle, designated generally 8: and comprising the'invention includesan elongated outer end portion or stem'9 and an opposite end portion or shank i0. The adjacent ends of the stem 9 and shank ID are integrally joined by a frusto-conical neck II which is tapered in, a di-. rection toward the shank l0 and which forms an annular shoulder I 2 at its junction therewith and which faces toward the stem 9; The enlarged end of the .neck H merges with the periphery of the stem 9 which, like the shank i0 is circular in cross section.

. The stem 9 at its opposite, outer end is provided with a slot l3 which extends transversely therethrough and which opens outwardly of the outer end thereof. The slot I3 may be inclined with respect to the axis .of the spindle 8, as illustrated in Figure 3, if desired. Said last mentioned end of the stem Sis provided with a substantially radially disposed internally threaded bore H, extending from the periphery thereof and opening into the slot l3 for receiving a set screw [5, for a .purpose which will hereinafter become apparent. I

-An externally knurled collar i6 is removably disposed on the-shank Ill and is provided with a bore l1 whichtapers from end-to-end thereof and with the largest end of the bore disposed at the innerend of the collar or adjacent the stem 9. Asbest illustrated in Figure 5, an elongated strip iii of abrasive material is adapted to be woundspirally about the stem 9, as best seen in Figure l and with convolutions thereof preferably in engagement. The strip I8 is provided with a reduced end l9 formed by cutting one longitudihal edge thereof off at an angle, as seen in Figure 5, and said end i9 is adapted'to be inserted transversely into the slot 43 and is secured therein by tightening the set screw 15. The strip I8 is then wound in either direction spirally about the stem 9 and so that its abrasive side will be outermost. The strip is is provided with an opposite tapered end 20 formed by cutting its other longitudinal edge at an angle, as seen in Figure 5, and said strip is of such a length that when wound as seen in Figure 1 on the stem 9 said tapered end 20 will be disposed in engagement with the frusto-conical neck ll. After thus winding the strip IS on the stem 9 the retaining collar i6 is applied and engaged over the end portion 20 of the strip by advancing the collar toward the stem 8 while rotating it in the same direction that the strip I8 is wound. In order to provide a secure connection against slippage for said last mentioned end of the abrasive strip IS, the stem 9 adjacent the neck H is provided with a roughened or serrated annular portion 2| to afford a frictional engagement with the inner Side of he sh t it and th rated exte na s face of the strip will provide a good irictional one gagement with the retaining ring l6 and will roughen and serrate the enlarged end of the bore l1 thereof so that a secure connection will be provided and which will only be released upon rotation of the retaining collar [6 in the opposite direction and while drawing said collar outwardly of the shank l0.

Obviously, if the abrasive strip 18 is of sumcient thickness its end i9 will be retained in the slot IS without the use of the set screw l5 which, however, will afiord additional securing means and is essential for relatively thin abrasive strips.

Figures 6 and '7 illustrate a slightly modified form of spindle 8a which diflers from the spindle i} only in respect to the outer end of the stem to thereof. The outer end of the stem 9a is provided with a restricted neck 22 of circular cross section on which a sleeve or collar 23 is turnably mounted and retained in applied position there: on by the rolled or enlarged outer end 24 of said neck 22. The slot 13a of the stem 9a and which corresponds to the slot 13, is formed in the neck 22 thereof and opens outwardly of the enlarged end of said neck and extends transversely therethrough. The sleeve 23 is provided with complementary longitudinally extending slots 25 which open outwardly of the outer end thereof, as seen in Figure 6, and which extend inwardly substantially to the depth of the slot Ha As seen in Figure 6, the sleeve 23 may be rotated to position both of the slots 25 in registry with the slot Ba and when so disposed, the end IQ of the abrasive strip l8 can be inserted transversely through one of said slots 25 into the slot Ho. The strip I8 is then wound in the same manner as previously described, and it will be readily apparent that the initial convolution of the strip l8 will engage partially around the sleeve 23 and will cause said sleeve to be rotated on the neck 22, in the direce tion that the strip 18 is wound, so that one edge of the slot 25 through which the strip extends, as seen in Figure 6, will be moved into a position to clamp a portion of the strip end 19 between said edge and an adjacent edge of the slot I312 to thereby securely clamp the ends IS in the slot 3a and without the use of a set screw or other means, The opposite end 20 of the strip i8 is e cur n the a m n a Prev ous e scribed and as best illustrated in Figure 31 Various other modifications and changes are l wise c m t d nd ma ob i l be r with said first mentioned slot and through one at which last mentioned slots an end of the strip is adapted to extend into the first mentioned slot, said strip being wound around said sleeve for causing the sleeve to rotate on the neck for moving the slots thereof out .of complete registry with the slot of said neck for clamping said strip end in the first mentioned slot.

2. A spindle for mounting a flexible abrasive strip or the like corxnirisinga stem portion on which an abrasive strip is adapted to be spirally wound, said stem having a restricted neck portion provided with a transversely disposed slot, a sleeve rotatably mounted on said neck and having a slot for registry with the first mentioned slot, said slots being adapted to be disposed in alignment for receiving an end of the strip and said strip, being wound about said sleeve for rotating the sleeve on the neck portion for moving the slots out of registry for clamping said end therein.

3. A spindle for mounting a flexible abrasive strip or the like, comprising" a portion on which an abrasive strip is adapted to be spirally wound, said portion being provided with a transversely disposed slot, a sleeve rotatably mounted on said slotted portion and having a slot for registry with the first-mentioned slot and adapted to be disposed in alignment therewith for receiving an end of the abrasive strip, said strip being wound about said sleeve for applying a torsional pres= sure thereto for moving the slot out of registry for clamping the aforementioned end of the abra: sive strip therein.

QTTO. K. ZIEBUR.

liEFEBENGES CIIED The following references are of record in the le 12 1 dl' fillt STA ES ATENTS Number Name Date 541L258 Ke agle June 4, 1395 1,039,778 Hallam June 25, 1912 11189298 Bertrand Jan. 20, 1931 1,835,257 Anstett Dec. 8, 1-931 2,369,456 Hoskin et a1 Jan. 26, 1943 

